Leaves discolouring during flowering ?

Quote:

Originally Posted by redeyemcgraw

Hi guys,

I have a couple of problems im hoping someone can help me with , firstly i have 2 dutch passion number one plants in around week 5 of flowering , but on one of the little fellas all the leaves have started to discolour as shown in the pics, now the top two colas have become very bad over the last couple of days, even a small spot of white mouldy looking stuff started growing on a few leaves. my setup is a 250 hps, i was feeding tomato feed, but flushed about a week ago and am now using bio bizz bloom as from yesterday. im only doing this in my shed and as i live in Ireland the temps are down to around 16 during day ( sleeping) and 21 when the light is on. im getting worried this little babies ive nurtured for so long are gonna die on me. I decided today to chop the top 2 fellas off incase they went bad altogether.

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Secondly i have another plant going in the garden , ive had him on a 12/12 for the past 8 weeks, but all that happened was the leaves went really long and thin and now are coming off the plant, most leaves consist of 1 or 3 leaves, but i have started noticing crystals forming and the buds are taking a bit of shape, should i chop off all these straggley leaves to let the buds try suck the goodness ??? Im lost completely with this guy and dont have much hope of him doing much. I put him under the light tonight with the other 2, so will see how it goes, just wondering does anyone know why theaves have gone this way ???

Sorry its so long and on my first post, so thanks in advance guys !!!

Redeye

Zinc (Zn) Micro Nutrient and an Immobile element.

Zinc plays a lot of roles in the plants, first off zinc aids in the plants size and maturity as well as production of leaves, stalks, stems and branches. Zinc is an essential component in many enzymes as well as growth hormone auxin .Low auxin levels can be the cause of stunting of the plants leaves and the shoots. Zinc is also important in the formation and activity of chlorophyll. Plants that have a good level of Zinc, can handle long droughts. So thatâ??s why Zinc plants an important role how it absorbs moisture.

Zinc deficiencies on some plants will have the Spotting and bleached spots (chlorosis) between the veins first appears on the older leaves first, and then goes on to the immature leaves. It will then start to slowly affect tips of growing points of the plants. When the zinc deficiency happens so suddenly, the spotting can appear to be the same symptoms to that of an iron and manganese, without the seeing the little leaf symptom.
Zinc is not mobile in plants so the symptoms will occur mainly in the newer growths. Having a plant that is deficiency in Zinc can cause small crops, short shoots and have a cluster of small distorted leaves near the tips. Between the veins (Interveinal) yellowing is often combined with overall paleness. Pale or grayish, yellowing between the veins; rosetted weak is the signs of a Zinc deficiency.
With a low level of zinc in your plants, your yields will be dramatically reduced.
Interveinal chlorosis is present in the small, narrow distorted leaves at the ends of really shortened shoots and the shortening between internodes. Leaf margins are often distorted or wrinkled. These nutrients will get locked out due to high pH: Zinc, Iron, and Manganese. These deficiencies will often occur together. Parts affected by a zinc deficiency are young leaves and petioles.

Having an excess of Zinc is very rare, but when it does happen it can cause wilting and in worse cases death.

Problems with Zinc being locked out by PH troubles

High ph, Low organic matter, High Phosphorus levels in the soil, and or lack of nitrogen.

Soil

Zinc gets locked out of soil growing at ph levels of 4.5-4.7, 7.5-9.5
Zinc absorbed best in soil at a ph level of 5.0-7.0 (Wouldnâ??t recommend having a soil ph of over 7.0 in soil) Anything out of the ranges listed will contribute to a Zinc Deficiency.

Hydro and Soil less Mediums

Zinc gets locked out of Hydro and Soil less Mediums at ph levels of 5.7-8.5
Zinc is absorbed best in Hydro and Soil less Mediums at ph levels of 4.0-5.5 (Wouldnâ??t recommend having a ph over 6.5 in hydro and soil less mediums.) Best range for hydro and soil less mediums is 5.0 to 6.0. Anything out of the ranges listed will contribute to a Zinc Deficiency.

Solution to fixing a Zinc deficiency
Any Chemical/Organic nutrients that have potassium in them will fix a Zinc deficiency. (Only mixing at Â½ strength when using chemical nutrients or it will cause nutrient burn!)
And any of the following nutrients will fix a zinc deficiency: Zinc sulfate, zinc chelated, or zinc oxides are adequate fertilizer sources for zinc. Or you can bury galvanized nails in the soil. (Make sure you take off the sharp point at the end to prevent roots from being damaged) Garden Manure, which is slow acting. Greensands, Cottonseed Meal are both medium/slow absorption as well.